libavcodec/jpeg2000dec.c: Support for CRG marker
This patch adds support to skip the CRG marker.
The CRG marker, is an informational marker.
Allows samples such as p0_03.j2k to be decoded.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index af6dcee..5a7d9e7 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -798,6 +798,15 @@
return 0;
}
+static int read_crg(Jpeg2000DecoderContext *s, int n)
+{
+ if (s->ncomponents*4 != n - 2) {
+ av_log(s->avctx, AV_LOG_ERROR, "Invalid CRG marker.\n");
+ return AVERROR_INVALIDDATA;
+ }
+ bytestream2_skip(&s->g, n - 2);
+ return 0;
+}
/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
* Used to know the number of tile parts and lengths.
* There may be multiple TLMs in the header.
@@ -2061,6 +2070,9 @@
// the comment is ignored
bytestream2_skip(&s->g, len - 2);
break;
+ case JPEG2000_CRG:
+ ret = read_crg(s, len);
+ break;
case JPEG2000_TLM:
// Tile-part lengths
ret = get_tlm(s, len);